350/255HP Help please

Adger Smith · 05-30-2016, 10:55 PM

Painter,
I'm with you on the cam deal. It would make sense that the RPM is down if the intake or Ex lobes were not in the right place. (not just the intake C/L)
I still stand by the hot vs cold leak. If your looking for a problem look at all parts of it as the engine runs. The bad ex seats could kill the RPM, too. I would pull the intake and look for signs of bad reversion. That would point to cam and or a couple other issues as well as ex diluting the intake charge. OH, if you can't find an exact cause go slow and just make one change at a time. don't dig yourself deeper in the hole.
Good luck..

05-30-2016, 10:55 PM	#25
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: 350/255HP Help please Painter, I'm with you on the cam deal. It would make sense that the RPM is down if the intake or Ex lobes were not in the right place. (not just the intake C/L) I still stand by the hot vs cold leak. If your looking for a problem look at all parts of it as the engine runs. The bad ex seats could kill the RPM, too. I would pull the intake and look for signs of bad reversion. That would point to cam and or a couple other issues as well as ex diluting the intake charge. OH, if you can't find an exact cause go slow and just make one change at a time. don't dig yourself deeper in the hole. Good luck.. __________________ Adger Smith (Former SS)